EP1178011B1 - Procédé de préparation d'oxyde de titane - Google Patents

Procédé de préparation d'oxyde de titane Download PDF

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Publication number
EP1178011B1
EP1178011B1 EP01302973A EP01302973A EP1178011B1 EP 1178011 B1 EP1178011 B1 EP 1178011B1 EP 01302973 A EP01302973 A EP 01302973A EP 01302973 A EP01302973 A EP 01302973A EP 1178011 B1 EP1178011 B1 EP 1178011B1
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EP
European Patent Office
Prior art keywords
titanium
ammonia
titanium oxide
process according
convert
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP01302973A
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German (de)
English (en)
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EP1178011A1 (fr
Inventor
Yoshiaki Sakatani
Hironobu Koike
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Sumitomo Chemical Co Ltd
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Sumitomo Chemical Co Ltd
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Filing date
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Priority claimed from JP2000230779A external-priority patent/JP2002047012A/ja
Application filed by Sumitomo Chemical Co Ltd filed Critical Sumitomo Chemical Co Ltd
Priority to EP05020936A priority Critical patent/EP1614659A3/fr
Publication of EP1178011A1 publication Critical patent/EP1178011A1/fr
Application granted granted Critical
Publication of EP1178011B1 publication Critical patent/EP1178011B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G23/00—Compounds of titanium
    • C01G23/04—Oxides; Hydroxides
    • C01G23/047—Titanium dioxide
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G23/00—Compounds of titanium
    • C01G23/04—Oxides; Hydroxides
    • C01G23/047—Titanium dioxide
    • C01G23/053—Producing by wet processes, e.g. hydrolysing titanium salts
    • C01G23/0532—Producing by wet processes, e.g. hydrolysing titanium salts by hydrolysing sulfate-containing salts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/30—Catalysts, in general, characterised by their form or physical properties characterised by their physical properties
    • B01J35/39—Photocatalytic properties
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/03—Precipitation; Co-precipitation
    • B01J37/031—Precipitation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y30/00—Nanotechnology for materials or surface science, e.g. nanocomposites
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01G—COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSES C01D OR C01F
    • C01G23/00—Compounds of titanium
    • C01G23/04—Oxides; Hydroxides
    • C01G23/047—Titanium dioxide
    • C01G23/053—Producing by wet processes, e.g. hydrolysing titanium salts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
    • B01J21/063—Titanium; Oxides or hydroxides thereof
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/61—Micrometer sized, i.e. from 1-100 micrometer
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
    • C01P2004/00—Particle morphology
    • C01P2004/60—Particles characterised by their size
    • C01P2004/64—Nanometer sized, i.e. from 1-100 nanometer

Definitions

  • the present invention relates to a process for producing titanium oxide. Specifically, the present invention relates to a process for producing titanium oxide suitable for use for a photocatalyst.
  • One of the purposes in the present invention is to provide a process for easily producing a titanium oxide showing a high photocatalytic activity by visible light radiation without using a specific apparatus equipped with a vacuum container.
  • the purpose of the present invention is to provide a process for easily producing a titanium oxide having a small particle size.
  • That is the present invention provides a process for producing a titanium oxide which comprises the steps of
  • the process of the present invention may further comprise a step (i)' of adding a base to the reaction product to conduct aging prior to the calcination step.
  • a titanium compound to be used for the present invention may be any titanium compound capable of producing a titanium hydroxide by reaction with a base and examples thereof are titanium trichloride (TiCl 3 ), titanium tetrachloride (TiCl 4 ), titanium sulfate [Ti(SO 4 ) 2 ⁇ mH 2 O, 0 ⁇ m ⁇ 20], titanium oxysulfate [TiOSO 4 ⁇ nH 2 O, 0 s n ⁇ 20], titanium oxychloride (TiOCl 2 ) and the like. Among them, titanium oxysulfate is preferably used.
  • a titanium compound having a high purity is preferably used and a titanium compound having a purity of 99 % by weight or higher is more preferably used.
  • a titanium compound with a high purity By using a titanium compound with a high purity, a minute particulate titanium oxide exhibiting a high photocatalytic activity may be obtained.
  • the purity of the titanium compound may be measured by JIS K8401-1992 method in the case of titanium trichloride and by JIS K8460-1992 method in the case of titanium tetrachloride.
  • the production process of the present invention comprises a step of reacting a titanium compound with ammonia in an amount exceeding the stoichiometric amount necessary to convert the titanium compound to a titanium hydroxide prior to the calcining step.
  • the stoichiometric amount is practically equivalent to the amount (by mole) of (B ⁇ C) times as much as the molar amount of titanium compound to be converted, the (B ⁇ C) being calculated by multiplying the number B of the acid radicals contained in one molecule of the titanium compound by the valence C of the acid radicals.
  • the stoichiometric amount necessary to convert the titanium compound to a titanium hydroxide is the amount of, for example, 3 times (by mole) in the case of using titanium trichloride, 4 times (by mole) in the case of using titanium tetrachloride, 4 times (by mole) in the case of using titanium sulfate, 2 times (by mole) in the case of using titanium oxysulfate, and 2 times (by mole) in the case of titanium oxychloride as much as the molar amount of titanium compound to be converted.
  • a titanium compound is reacted with ammonia in an amount exceeding the stoichiometric amount and the amount of ammonia may be that of about 1.2 times or more, preferably about 2 times or more as much as the stoichiometric amount, and abut 20 times or less, preferably about 10 times or less as much as the stoichiometric amount.
  • the reaction of a titanium compound with ammonia is carried out at about 40°C or lower and preferably about -5°C or lower.
  • the reaction may be carried out in a process comprising the steps of placing a titanium compound in a reaction container, adding ammonia, e.g. ammonia solution (ammonia water) while stirring them and mixing them, in a process comprising the steps of placing ammonia in a reaction container, adding a titanium compound while stirring them and mixing them, or in a process comprising the steps of simultaneously placing a titanium compound and ammonia in a reaction container and mixing them.
  • ammonia e.g. ammonia solution (ammonia water)
  • the product obtained by reacting a titanium compound with ammonia in an amount exceeding the stoichiometric amount or the product obtained by aging the product may be obtained in a slurry of a reaction mixture.
  • the slurry containing the product may be used for the calcining step as it is or after the slurry is subjected to solid-liquid separation and the separated solid is washed if necessary.
  • the separation may be carried out by pressure filtration, vacuum filtration, centrifugal separation, decantation or the like. Alternatively, the separation may be carried out by heating the slurry with a pneumatic conveying drying to evaporate the liquid therein.
  • the obtained slurry or the product recovered from the slurry by separation operation is then calcined.
  • the calcination may be carried out at about. 300°C or higher, preferably at about 350°C or higher, and is carried out at about 600°C or lower, preferably at about 500°C or lower.
  • the calcining temperature is too high, the photocatalytic activity of the resulting titanium oxide may decrease.
  • the calcination may be carried out in a pneumatic conveying furnace, a tunnel furnace, a rotary furnace or the like.
  • the titanium oxide obtained by the process of the present invention may have an anatase-type crystal structure.
  • the titanium oxide exhibits a photocatalytic activity by radiation of ultraviolet light and/or visible light.
  • the titanium oxide exhibiting an especially high photocatalytic activity by visible light radiation may be a titanium oxide which is obtained by a process which further comprises a step (i)' of adding a base to the reaction product to conduct aging prior to the calcination step.
  • the obtained titanium oxide may be used for a variety of applications such as for decomposing NO x in atmospheric air, for decomposing and removing malodorous substances and mold or for decomposing and removing an organic solvent in water, as it is or after a molding processing.
  • titanium oxide having a high photocatalytic activity can be easily obtained by the production process of the present invention.
  • a minute particulate titanium oxide with the average particle size of about 20 ⁇ m or smaller and showing a photocatalytic activity can be also easily obtained.
  • a minute particulate titanium oxide having a more excellent in photocatalytic activity by the radiation of the visible light can easily be obtained.
  • a titanium oxide to be measured was dispersed in an aqueous sodium hexametaphosphate solution (0.2 % by weight, produced by Wako Pure Chemical Industries, Ltd.), and then a 50 vol.% diameter of the titanium oxide was measured in the solution using a particle size distribution measuring apparatus (trade name: MICROTRAC HRA model 9320-X100, produced by Nikkiso Co., Ltd.).
  • the obtained 50 vol.% diameter was referred to as an average particle size of the titanium oxide.
  • a crystal structure of titanium oxide was obtained using an X-ray diffraction meter (trade name: RAD-IIA, produced by Rigaku Denki Co., Ltd.).
  • a sealed-type glass reaction vessel (diameter: 8 cm, height: 10 cm, volume: about 0.5 L), was placed a 5-cm diameter glass Petri dish on which 0.3g of sample titanium oxide.
  • the irradiation was carried out using a 500 W xenon lamp as the light source (made by USHIO INC., trade name; Optical Modulex SX-UI500XQ, lamp; UXL-500SX) equipped with an ultraviolet cutting filter (made by Asahi Techno-Glass Co. , Ltd., of which former name is Toshiba Glass Co. , Ltd. , trade name : Y-45) cutting off ultraviolet light having a wavelength of about 430nm or shorter and an infrared cutting filter (made by USHIO INC. , trade name: Supercold Filter) cutting off infrared light having a wavelength of about 830nm or longer.
  • a 500 W xenon lamp as the light source
  • an ultraviolet cutting filter made by Asahi Techno-Glass Co. , Ltd., of which former name is Toshiba Glass Co. , Ltd. , trade name : Y-45
  • an infrared cutting filter made by USHIO INC. , trade name: Supercold
  • ammonia water (ammonia water) (special grade, produced by Wako Pure Chemical Industries, Ltd.) was diluted with 180 g of water to prepare 15% ammonia solution.
  • the 15% ammonia solution was cooled in a cooling tank at -30°C and then the obtained titanium oxysulfate was added thereto while stirring at 400 rpm and mixed to cause a reaction and obtain a slurry.
  • the amount of ammonia utilized at that time was equivalent to that of 8 times by mole as much as the stoichiometric amount of the ammonia necessary to convert the titanium oxysulfate to a titanium hydroxide.
  • the obtained slurry was filtered to obtain a titanium hydroxide, and the obtained titanium hydroxide was washed and dried. After that, the obtained titanium hydroxide was calcined for 1 hour in air at 400°C to obtain a particulate titanium oxide.
  • the photocatalytic activity of the obtained titanium oxide for acetaldehyde was measured. As a result, a generation rate of carbon dioxide per 1g of titanium oxide was 189.9 ⁇ mol/h.
  • Example 2 Into 1-L flask, was poured 100 g of water. Then, 60g of the same grade of hydrated titanium oxysulfate (produced by SOEKAWA CHEMICAL Co., Ltd.) as utilized in Example 1 was added thereto while stirring and dissolved therein. The resulting solution was concentrated by removing water with an evaporator at 70°C to obtain a titanium oxysulfate. In a cooling tank at -30°C, 68 g of 25% ammonia solution (special grade, produced by Wako Pure Chemical Industries, Ltd.) was cooled and then the obtained titanium oxysulfate was added thereto while stirring at 400 rpm and mixed to cause a reaction and obtain a slurry.
  • a cooling tank at -30°C 68 g of 25% ammonia solution (special grade, produced by Wako Pure Chemical Industries, Ltd.) was cooled and then the obtained titanium oxysulfate was added thereto while stirring at 400 rpm and mixed to cause a reaction and obtain a
  • the amount of ammonia utilized at that time was equivalent to that of 2 times by mole as much as the stoichiometric amount of the ammonia necessary to convert the titanium oxysulfate to a titanium hydroxide.
  • the obtained slurry was filtered to obtain a titanium hydroxide, and the obtained titanium hydroxide was washed and dried. After that, the obtained titanium hydroxide was calcined for 1 hour in air at 400°C to obtain a particulate titanium oxide.
  • the photocatalytic activity of the obtained titanium oxide for acetaldehyde was measured. As a result, a generation rate of carbon dioxide per 1g of titanium oxide was 93. 88 ⁇ mol/h.
  • Example 2 In 68 g of water, was dissolved 102 g of the same grade of hydrated titanium oxysulfate as utilized in Example 1 to prepare an aqueous titanium oxysulfate solution having pH of about 1.
  • Water in the amount of 300 g was put in a 1-L flask equipped with a pH electrode and a pH controller connected to the pH electrode so as to keep the pH therein constant by supplying 25% by weight of ammonia solution (special grade, produced by Wako Pure Chemical Industries, Ltd.).
  • the pH of the pH controller was set to be 4 and the pH of the water in the flask was adjusted to the set pH value.
  • 170 g of the aqueous titanium oxysulfate solution prepared in the above-described manner was added at 5 ml/min to the flask and reacted with ammonia solution supplied to the flask, while the pH of the resulting slurry provided by the reaction therein being controlled by the pH controller.
  • the amount of 58 g of the 25 wt.% ammonia solution was supplied to the flask until the aqueous titanium oxysulfate solution was completely added.
  • the pH of the slurry in the flask was in the range of from 3. 6 to 4. 6.
  • the pH of the slurry was pH 3.9 to 4.0.
  • the temperature of the slurry was 24°C at the time of starting the addition of the aqueous titanium oxysulfate and 40°C at the time of finishing the addition.
  • the slurry obtained above was kept for 1 hour while stirring and then 56g of ammonia solution (25% by weight, produced by Wako Pure Chemical Industries, Ltd.) was added thereto.
  • the slurry was kept for another 1 hour while stirring to conduct aging of the reaction product contained in the slurry. While aging, the temperature of the slurry was constant at 30°C. (The total amount of ammonia in the ammonia solution supplied to the flask was 114g, which was equivalent to that of 2 times by mole as much as the stoichiometric amount necessary to convert the titanium oxysulfate to the titanium hydroxide.)
  • the slurry containing the reaction product obtained after aging was filtered, washed and dried. After that, the dried product was calcined for 1 hour in air at 400°C to obtain a particulate titanium oxide.
  • the titanium oxide had an average particle size of 3.5 ⁇ m and anatase-type crystal structure.
  • the photocatalytic activity of the obtained titanium oxide for acetaldehyde was measured. As a result, a generation rate of carbon dioxide per 1g of titanium oxide was 20.93 ⁇ mol/h.
  • Example 2 In 408 g of water in a 1-L flask, was dissolved 102 g of the same grade of hydrated titanium oxysulfate as utilized in Example 1 to prepare an aqueous titanium oxysulfate solution. With stirring at 400 rpm, 58 g of an ammonia solution (25% by weight, produced by Wako Pure Chemical Industries, Ltd.) was supplied thereto at 5 ml/min and reacted with the aqueous titanium oxysulfate solution.
  • an ammonia solution (25% by weight, produced by Wako Pure Chemical Industries, Ltd.
  • the amount of ammonia in the 58g ammonia solution was equivalent to 1 time by mole as much as the stoichiometric amount necessary to convert the titanium oxysulfate to a titanium hydroxide.
  • the pH of the resulting slurry in the flask was 0.7.
  • the pH of the slurry was 4.0.
  • the temperature of the slurry was 62°C at the time of starting the addition of the ammonia solution and then 65°C at the time of finishing the addition.
  • the slurry was filtered, washed and dried. After that, the dried product was calcined for 1 hour in air at 400°C to obtain a particulate titanium oxide.
  • the titanium oxide had an average particle size of 41.8 ⁇ m.
  • the photocatalytic activity of the obtained titanium oxide for acetaldehyde was measured. As a result, a generation rate of carbon dioxide per 1g of titanium oxide was 0 ⁇ mol/h.

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  • Inorganic Compounds Of Heavy Metals (AREA)

Claims (11)

  1. Procédé servant à produire un oxyde de titane lequel comprend les étapes consistant à
    (i) faire réagir un composé du titane avec de l'ammoniac, la réaction étant effectuée à une température inférieure ou égale à environ 40°C et la quantité d'ammoniac étant supérieure à la quantité stoechiométrique nécessaire pour convertir le composé du titane en un hydroxyde de titane, pour obtenir un produit de réaction et
    (ii) calciner le produit de réaction de l'étape (i) à une température inférieure ou égale à environ 600°C.
  2. Procédé selon la revendication 1, lequel comprend en plus une étape (i)' consistant à ajouter une base au produit de réaction pour effectuer un vieillissement avant l'étape de calcination.
  3. Procédé selon la revendication 2, dans lequel la quantité totale de l'ammoniac utilisé pour la réaction dans l'étape (i) et de la base utilisée pour le vieillissement dans l'étape (i)' est une quantité supérieure à la quantité stoechiométrique nécessaire pour convertir le composé du titane en un hydroxyde de titane.
  4. Procédé selon la revendication 2 ou 3, dans lequel on utilise de l'ammoniac pour le vieillissement dans l'étape (i)'.
  5. Procédé selon l'une quelconque des revendications précédentes, dans lequel la quantité totale d'ammoniac dans l'étape (i) est supérieure ou égale à 1,2 fois en mole la quantité stoechiométrique nécessaire pour convertir le composé du titane en un hydroxyde de titane.
  6. Procédé selon l'une quelconque des revendications précédentes, dans lequel la quantité totale d'ammoniac dans l'étape (i) est supérieure ou égale à environ 2 fois en mole la quantité stoechiométrique nécessaire pour convertir le composé du titane en un hydroxyde de titane.
  7. Procédé selon l'une quelconque des revendications précédentes, dans lequel la quantité totale d'ammoniac dans l'étape (i) est d'environ 2 fois en mole à environ 20 fois en mole la quantité stoechiométrique nécessaire pour convertir le composé du titane en un hydroxyde de titane.
  8. Procédé selon l'une quelconque des revendications précédentes, dans lequel la quantité totale d'ammoniac dans l'étape (i) est d'environ 2 fois en mole à environ 10 fois en mole la quantité stoechiométrique nécessaire pour convertir le composé du titane en un hydroxyde de titane.
  9. Procédé selon l'une quelconque des revendications 1 à 8, dans lequel on effectue la réaction avec de l'ammoniac dans l'étape (i) à une température inférieure ou égale à environ -5°C.
  10. Procédé selon l'une quelconque des revendications précédentes, dans lequel le composé du titane est choisi entre le trichlorure de titane, le tétrachlorure de titane, le sulfate de titane, l'oxysulfate de titane et l'oxychlorure de titane.
  11. Procédé selon l'une quelconque des revendications précédentes, dans lequel le produit de réaction de l'étape (i) est un hydroxyde de titane.
EP01302973A 2000-07-31 2001-03-29 Procédé de préparation d'oxyde de titane Expired - Lifetime EP1178011B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP05020936A EP1614659A3 (fr) 2000-07-31 2001-03-29 Procédé de préparation d'oxyde de titane

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2000230779A JP2002047012A (ja) 2000-07-31 2000-07-31 酸化チタンの製造方法
JP2000230779 2000-07-31
JP2000388333 2000-12-21
JP2000388333 2000-12-21

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP05020936A Division EP1614659A3 (fr) 2000-07-31 2001-03-29 Procédé de préparation d'oxyde de titane

Publications (2)

Publication Number Publication Date
EP1178011A1 EP1178011A1 (fr) 2002-02-06
EP1178011B1 true EP1178011B1 (fr) 2006-07-05

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EP01302973A Expired - Lifetime EP1178011B1 (fr) 2000-07-31 2001-03-29 Procédé de préparation d'oxyde de titane
EP05020936A Withdrawn EP1614659A3 (fr) 2000-07-31 2001-03-29 Procédé de préparation d'oxyde de titane

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EP05020936A Withdrawn EP1614659A3 (fr) 2000-07-31 2001-03-29 Procédé de préparation d'oxyde de titane

Country Status (8)

Country Link
US (1) US6726891B2 (fr)
EP (2) EP1178011B1 (fr)
KR (1) KR100705990B1 (fr)
CN (1) CN1217862C (fr)
AU (1) AU781450B2 (fr)
CA (1) CA2342665A1 (fr)
DE (1) DE60121261T2 (fr)
TW (1) TWI230689B (fr)

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JP3949374B2 (ja) 2000-07-17 2007-07-25 住友化学株式会社 酸化チタン、それを用いてなる光触媒体および光触媒体コーティング剤
US7045005B2 (en) 2001-07-19 2006-05-16 Sumitomo Chemical Company, Limited Ceramics dispersion liquid, method for producing the same, and hydrophilic coating agent using the same
FI20012397A (fi) * 2001-12-05 2003-06-06 Kemira Pigments Oy Titaanidioksidifotokatalyytti ja sen valmistusmenetelmä ja sen käytöt
JP2003246622A (ja) * 2002-02-25 2003-09-02 Sumitomo Chem Co Ltd 酸化チタン前駆体、その製造方法およびそれを用いる酸化チタンの製造方法
JP4374869B2 (ja) 2002-05-27 2009-12-02 住友化学株式会社 セラミックス分散液の製造方法
JP2004026553A (ja) 2002-06-25 2004-01-29 Sumitomo Chem Co Ltd 酸化チタン分散液およびその保存容器
JP4269621B2 (ja) * 2002-10-04 2009-05-27 住友化学株式会社 酸化チタンの製造方法
JP2004196626A (ja) * 2002-12-20 2004-07-15 Sumitomo Chem Co Ltd 酸化チタンの製造方法
TW200420499A (en) * 2003-01-31 2004-10-16 Sumitomo Chemical Co A method for producing titanium oxide
FI117754B (fi) 2004-02-06 2007-02-15 Kemira Pigments Oy Titaanidioksidituote, sen valmistusmenetelmä ja käyttö fotokatalyyttinä
JP4393963B2 (ja) 2004-03-17 2010-01-06 住友化学株式会社 光触媒体コーティング液
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KR101396803B1 (ko) * 2006-09-21 2014-05-21 토쿠센, 유.에스.에이. 인코포레이티드 나노 사이즈의 이산화티탄 입자들을 제조하기 위한 저온 방법
CN100429152C (zh) * 2006-11-21 2008-10-29 浙江大学 一种制备三氧化二铁或氧化铜纳米球的方法
JP5082950B2 (ja) * 2008-03-13 2012-11-28 住友化学株式会社 揮発性芳香族化合物の分解方法
JP2010115635A (ja) * 2008-06-05 2010-05-27 Sumitomo Chemical Co Ltd 光触媒体分散液、その製造方法およびその用途
DE102009017409A1 (de) 2008-10-04 2010-04-08 Friedrich-Alexander-Universität Erlangen-Nürnberg Azin-modifizierter Titandioxid-Photokatalysator und Verfahren zu seiner Herstellung
IT1396429B1 (it) 2009-10-14 2012-11-23 Italcementi Spa Prodotti e manufatti cementizi contenenti biossido di titanio dopato con carbonio.
IT1396367B1 (it) 2009-10-14 2012-11-19 Italcementi Spa Procedimento per la preparazione di biossido di titanio dopato con carbonio.
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AU3140401A (en) 2002-02-07
EP1614659A2 (fr) 2006-01-11
CN1336326A (zh) 2002-02-20
DE60121261T2 (de) 2007-05-31
KR100705990B1 (ko) 2007-04-12
CN1217862C (zh) 2005-09-07
US20030068268A1 (en) 2003-04-10
EP1178011A1 (fr) 2002-02-06
DE60121261D1 (de) 2006-08-17
AU781450B2 (en) 2005-05-26
TWI230689B (en) 2005-04-11
EP1614659A3 (fr) 2008-05-14
US6726891B2 (en) 2004-04-27
CA2342665A1 (fr) 2002-01-31

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